Career
That is where he meet Lewi Pethrus, with whom he would later form the Christian Democratic party in Sweden. When Birger became a full-time priest in 1961 he left the world of politics and did not return until 1964 when he became one of the founding members and the chairman of the Christian Democratic Coalition of Sweden. He retained the post of chairman until his premature death in 1972.
He was succeeded by Alf Svensson.